Display screen with a graphical user interface



FIG. 1 is a front view of a display screen with a graphical user interface in accordance with our design; and,

FIG. 2 is a front view of a display screen with a graphical user interface in accordance with our design.

The broken line showing a portion of the display screen in all views forms no portion of the claimed design. 

CLAIM The ornamental design for a display screen with a graphical user interface, as shown and described. 